REUNITED WITH HIS FAMILY IN ENGLAND 205 



to return to the United States at the earliest opportunity, 

 and he accordingly declined the offer. 



In July, 1866 representatives from Sweden and Nor- 

 way, and Holland came to London to be instructed. 

 There is some evidence that Russia and England also 

 sent representatives at this time. *T have a school 

 under weigh", humorously wrote Maury, "with Sweden 

 and Norway as pupils — board and tuition 500 pounds. 

 They will graduate in 'sea mining' this week. Monday 

 the 16th, the school opens for the Dutch at 500 pounds. 

 I have heard no more about turning Frenchman. But 

 the King of Wurttemberg has been pestering me to keep 

 the Prussians out of his pea-patch of a kingdom. 'Barkis 

 is willing', but I can't say whether anything will come 

 out of it ; I think not as the war looks like it is drawing to 

 a close". 



The lectures which Maury gave in connection with 

 the demonstrations of his mines gave an introductory 

 sketch of all that his predecessors since the time of 

 Priestly had done in this field, an account of all that had 

 been accomplished by the South with this new weapon 

 during the late war, and then in detail the results of his 

 own experiments. As far as the submarine mine was 

 concerned, he added nothing new to what he had set 

 down in the agreement with Holmes which was drawn 

 up by him just before leaving England near the close of 

 the war. But as to their use on land, the following de- 

 tails appear for the first time among his papers: "After 

 this hasty sketch, I come to electrical torpedoes for 

 guarding mountain passes and roadways, etc., for the 

 protection of strongholds and the defense of fortified 

 positions. Shells cast for the purpose should be used, 

 but in an emergency tin canisters, or any other perfectly 



